I thought I'd ask y'all what the toughest Greek you've ever read is? For me...if would probably have to be Sophopcles (O.R.) or Philo. As far as the New Testament goes....I just read through Hebrews and it kicked my butt fairly well....Lukan stuff isn't nearly as hard as people make it out to be (IMHO), and James can be a bit thick.

I tried to read a bit of Aristotle's Metaphysics once... it was completely impossible. Of course, I am a beginner in classical greek so it is all difficult to me. :P

as for NT, I haven't attempted Hebrews yet but hear it's the toughest of the lot. I haven't had any troubles with Luke whatsoever. It seems to me that Jude was more difficult... but it's been a long time since I attempted that one. :)